Question

• The first teacher paid $118.90 for 15hamburgers and 7 cheeseburgers.• The second friend paid $150.25 for 13hamburgers and 14 cheeseburgers.What was the cost in dollars of acheeseburger?F$5.15G$5.95H$4.95J$5.25Need help asap

Answer 1

hello

to solve this question, we need to write an equation to express what they have spent

let x represents hamburgers

let y represents cheeseburgers

from the first teacher, we have

$15x+7y=118.90\ldots\text{equ}1$

with the second teacher, we would have

$13x+14y=150.25\ldots\text{equ}2$

let's proceed and solve the above equations simultaneously

from equation 1

$\begin{gathered} 15x+7y=118.90 \\ \text{make x the subject of formula} \\ 15x=118.90-7y \\ \text{divide both sides by the coefficient of x} \\ \frac{15x}{15}=\frac{118.90-7y}{15} \\ x=\frac{118.90-7y}{15} \end{gathered}$

let's put